To understand social media fully, you must add the science of social media. Social media marketing may be thought of as a touchy feely topic since the word 'social' is attached. Once you begin to drill into more numbers, you will find there is much more.
This is a lecture given by Dan Zarrella, HubSpot's social media scientist, at Harvard on January 2011. Dan Zarrella NEVER dissapoints and always over delivers.